Rabbit Oviduct Isthmus Contraction Patterns in Estrus and after Human Chorionic Gonadotropin and Progesterone Treatment1

Administration of Human Chorionic Gonadotropin but Not of Luteinizing Hormone-Releasing Hormone at Pro-Oestrus or Late Di-Oestrus Has a Deleterious Effect on Pregnancy in the Rat

“…Oestrogens and progesterone have impor tant effects on embryo transport in the ovi duct [ 15] and in the regulation of uterine pro cesses related to implantation [16]. Synchro nization of embryo transport and uterine *age' is known to be a critical step for success ful implantation [17,18].…”

Endocrine Response in the Fallopian Tube

“…Early studies were made with cumbersome equipment (71). Miniaturization of transducers measuring strain (72,73) or variations in ultrasonic (74), electrical (75), or optical (76) impedance, all of which can be made to indicate changes of tubal diameter quite accurately, has enabled very satisfactory long term recordings to be made from rabbit and monkey fallopian tubes. In most cases multiple recordings from several sites along the tube have been possible, and signals have been sent telemetrically to distant recording equipment permitting the animal to move about freely.…”

Characterization of electrical and mechanical activities of rabbit uterus associated with the presence of capacitated and non-capacitated spermatozoa

“…Previous research on uterine motility has been focused on establishing interactions between electrical and mechanical characteristics of rabbit oviductal smooth muscle and between longitudinal and circular muscle (Talo, 1974;Ruckebusch, 1975;Coons and Johns, 1982). Analysis of the electrical spiking activity of the ewe oviduct and uterus during natural and induced estrus has also been examined (Ruckebusch and Bueno, 1976), as well as the effects of hormonal manipulation on the rabbit oviduct isthmus motility with the aid of special transducers (Muller and Nelsen, 1979;Bourdage and Halbert, 1980). Other research involves the study of electromyographic activity in the mare uterus during different estrous cycle stages (Troedsson et al, 1993), the study of uterine contractility (contraction frequency and the direction of propagation) by ultrasound in women (Fanchin et al, 2001) and recently the development of more sophisticated in vitro models to elucidate the complex way sperm-oviduct interaction actually works (Miessen et al, 2011).…”